<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 数据劫持
// Object.defineProperty

let person = {
    name:'冯总',
    eat:'dinner'
}
Object.defineProperty(person,'eat',{
    get() {
        return eat
    },
    set(newval) {
        // console.log(newval);
        eat = 'chicken'
    }
})
person.eat = 'duck'

console.log(person.eat);
    </script>
</body>
</html>